RU2667993C1 - Automatic line for production of mesh of rods - Google Patents

Abstract

FIELD: machine building.SUBSTANCE: invention relates to mechanical engineering and can be used in automatic lines for the production of a grid of rods. Automatic mesh production line comprises devices with longitudinal and transverse rods, a connection device for longitudinal and transverse rods, made in the form of a device for producing a melt of thermoplastic material, a mold, mold closing mechanism, a mesh moving mechanism, a forced cooling and / or heating system, and a stacking or winding mechanism in the form of a drum with a length measuring mesh cutter. System of forced cooling and / or heating is located in the area of the loading hopper for filling the material and in the zone of the upper and lower half-molds. Movement mechanism of the grid performs reciprocating movements and works continuously in cycles and periods and allows you not to stop the grid during the closing of the half-molds.EFFECT: increase in the productivity of the automatic line for the fabrication of a mesh with a large range of rod diameters is achieved, while at the same time increasing the strength of the connection of the intersections of the longitudinal and transverse rods.11 cl, 7 dwg

Description

The invention relates to mechanical engineering and can be used in automatic lines for the production of mesh from rods, which can be used as a reinforcing mesh for concrete, masonry mesh, enclosing mesh, etc.

A known line for the manufacture of a composite grid of rods (RU 2548358 C2, 04/20/2015), containing drums with longitudinal rods, a feed mechanism for longitudinal rods, at least one feed mechanism for the transverse rods, a device for connecting longitudinal and transverse rods and a stepwise movement mechanism of the grid , the device connecting the longitudinal and transverse rods is made in the form of an injection unit with a shape consisting of two parts of their closing mechanism.

The disadvantage of this line is the limited size of the cross-section of the rods due to the existing method of feeding longitudinal rods by winding from the drums. For metal rods according to GOST 5781-82, the largest diameter of the reinforcement supplied in the bays is 12 mm; for automatic gearboxes (composite polymer reinforcement) according to GOST 31938-2012, the largest diameter allowed to supply reinforcement in coils or drums is 8 mm.

In addition, since there is no cooling system in the known line, destruction of the composite material created on the thermosetting binder may occur, since the polymerization temperature of the material of the bond of the nodes of the intersection of the mesh exceeds the threshold for the onset of thermal degradation of the rods.

When using as a material for bonding the longitudinal and transverse rods of plastics, it is necessary to minimize the energy impact of elevated temperatures.

The technical result of the claimed invention is to increase the productivity of an automatic line for manufacturing a mesh with a large range of diameters of the rods, while increasing the strength of the connection between the intersections of longitudinal and transverse rods.

The technical result is achieved by the fact that in an automatic line for manufacturing a mesh containing devices with longitudinal and transverse rods, a device for producing a melt of thermoplastic material, a device for connecting longitudinal and transverse rods, a mold, a mechanism closing the mold, a forced cooling system and / or heating, a mesh moving mechanism, a stacking device or a winding mechanism in the form of a drum with a device of measured lengths of mesh.

The mesh moving mechanism makes reciprocating movements in cycles and periods determined by the technological features of the line.

Devices with longitudinal and transverse rods can be made in the form of drums, or in the form of mechanisms for the accumulation of rods coming directly from their production lines, or in the form of guiding devices with storage bins for longitudinal and transverse rods of a measured length with a diameter of more than 8 mm.

A device for producing a melt of thermoplastic material can be made in the form of a metering material cylinder or in the form of a two-chamber injection unit with a feeding device of the molding material by means of a screw.

A system for forced cooling and / or heating (depending on the technological conditions of the line necessary to optimize work with certain materials), which can be located in the area of the loading hopper for filling the material, cooling and / or pre-heating the source material, is brought to the device for producing a melt of thermoplastic material , and in the area of the upper and lower half-forms, cooling and / or heating the self-press mold.

The technical nature of the proposed solution is illustrated by drawings.

FIG. 1 - version of an automatic line with the supply of rods from the drums (side view);

FIG. 2 - version of an automatic line with the supply of rods from their production lines (side view);

FIG. 3 - version of an automatic line for rods with a diameter of more than 8 mm. (side view);

FIG. 4 shows an embodiment of a device for producing a melt of a thermoplastic material in the form of a two-chamber injection unit with a feeding device of a forming material by means of a screw;

FIG. 5 - a grid with a square cell;

FIG. 6 - mesh with a diamond-shaped cell;

FIG. 7 - volumetric grid.

An automatic line for manufacturing a mesh of composite material (Fig. 1) contains devices with longitudinal (2) and transverse (4) rods made in the form of drums (1) and a feed mechanism (3) of transverse rods, a device for producing a melt of thermoplastic material, made in the form of a metering material cylinder (5) for producing a thermoplastic material melt, a mold containing the upper half-mold (7a) and the lower half-mold (7b), the mold closing mechanism (for example, a hydraulic or pneumatic cylinder is not conventionally shown), systems cooling and / or heating (6), the moving mechanism (8) of the grid, the segments device (10) mesh cut length and the device (11) stacking or winding mechanism as a drum.

An automatic line for manufacturing the mesh (Fig. 2) allows the use of rods directly from the lines of their production (13), thus bypassing the intermediate operations of filling, installing, and storing interchangeable drums. To do this, instead of drums with longitudinal rods, an accumulation device (14) and either a feed mechanism for the transverse rods (3) (for rods up to 8 mm in diameter) or a guide device for transverse rods (12) (for rods with a diameter over 8 mm) are used.

When using in the automatic line of rods of measured length (Fig. 3) the place of the drums with longitudinal rods is used a guiding device (15), into which the longitudinal (2) rods will come from the loading bins, and the guiding device of the transverse rods (12). The guide device (15) is made in the form of trays, each of which has its own loading hopper. The number of trays is equal to the number of longitudinal rods. The guide device (12) is made in the form of an intermediate receiver with built-in grippers, through which, with the necessary frequency, the transverse (4) rods are fed into the working zone of the node formation. In turn, the transverse (4) rods in this receiver come from the storage hopper.

The number of drums (1), production lines (13), or guiding devices (15) should correspond to the number of longitudinal rods (2).

Longitudinal (2) and transverse (4) rods can have a round, ellipsoidal, rectangular, rhombic and other shape in cross section and can be made of either one (metal-metal, composite-composite) material or different (metal-composite) materials, while the rods may have a different size in cross section. In addition, the surface of the rods can be either smooth or rough (for example, coated with abrasive material), have ribs, protrusions, etc., which provides a more reliable connection with a thermoplastic material.

On this automatic line, it is possible to produce a grid in which the intersection of the longitudinal and transverse rods can occur at an angle of 90 degrees (Fig. 5) or at an angle of less than 90 degrees, for example, 45 degrees (Fig. 6). It is possible to manufacture 3D mesh. In this case, in addition to the feed mechanisms of the transverse rods located at an angle of 90 degrees with respect to the longitudinal rods, the automatic line may include additional feed mechanisms of the transverse rods located in another plane (higher or lower) with respect to the longitudinal rods (Fig. 7). Then the grid turns out to be voluminous and stiffer both with bending load and with respect to shear loads. The preferred field of application of such nets is column reinforcement, concrete structures.

The mesh movement mechanism makes reciprocating movements during operation, which eliminates the use of the feed mechanism of the longitudinal rods. The principle of operation of the movement mechanism is as follows: on the frame of the mechanism are fixed stops that, when moving forward, touch the transverse rod in the working area immediately after the formation of the clutch nodes, push it to a distance equal to the mesh pitch, thereby moving the already formed mesh section and, together with thereby carry out the entry of the longitudinal rods into the working area. While the mechanism makes a reverse movement, in the working area, the formation of the following clutch nodes occurs between the newly filed transverse rod and the moved longitudinal rods. The process is repeated continuously. In this case, the mechanism itself also carries out the movement of the mesh and ensures the supply of longitudinal rods to the working area, which eliminates the use of an additional feed mechanism of longitudinal rods. All these features significantly expand the functionality of the line and allow you to make a grid with a diameter of rods up to 36 mm.

A device for producing a melt of thermoplastic material can be made in the form of a two-chamber injection unit with a metering chamber (18), an injection chamber (16) and a feeding device (17) of thermoplastic material (Fig. 4).

The forced cooling and / or heating system allows to significantly expand the range of materials for creating a node for connecting the rods and to increase line productivity by reducing the time of formation of fastening nodes by thermal action, for example, by rapid polymerization of the material in the working area when cooling the mold, or by accelerating the production of melt when preheating the starting material.

The automatic line operates as follows:

Longitudinal rods (2) are supplied from the device with longitudinal rods due to reciprocating movements made by the mechanism (8) for moving the mesh (9), and enter the working zone of the node formation, located between the upper (7a) and lower (7b) semi-shapes . The transverse rods (4) are fed into this zone by means of devices with transverse rods. The closing mechanism connects the half-molds (7a) and (7b). A device for producing a melt of thermoplastic material supplies a certain amount (dose) of melt to the working zone of formation of the mesh fastening unit. After the opening of the half-form, the mesh fastening unit is in the cured (polymerized) state. Further, the cycle of the line is repeated. The mechanism (8) for moving the grid (9) makes reciprocating movements and works continuously according to the cycles and periods determined by the technological features of the line, and allows not to stop the grid (9) in the process of closing the half-molds (7a) and (7b) and ensures a guaranteed size given grid pitch (9). This mechanism moves the finished mesh (9) to the receiving device (11) with the subsequent segment of the measured length mesh on the cutting mechanism (10). During operation, a forced cooling and / or heating system is provided (6) (depending on the technological modes of the line necessary to optimize work with certain materials), which can be located in the zone of the loading hopper for filling the material and in the upper (7a) and lower (7b) semiform. Inside the system, heat transfer or heating fluid circulates.

Thermoplastic material can be either solid or elastic (polymers, rubbers, etc.). As the forming material, quick-hardening compositions are used: molten thermoplastics, thermosets, liquid glass, and so on. In the use of molten thermoplastics, the material cylinders should be heated to the processing temperature of the thermoplastic material. When cooling, the thermoplastic material securely fixes the longitudinal (2) and transverse rods (4).

The number of working zones for forming the mesh node and shapes in an automatic line is determined by its required productivity and the width of the fabricated mesh, depending on the number of longitudinal and simultaneously feeding transverse rods.

The tests showed that on the automatic line it is possible to produce mesh with high productivity with a wide range of materials to create a node for connecting the rods and a large range of diameters of the rods (up to 36 mm.) Made of metal or non-metallic material while maintaining the original characteristics of the rods and increasing the strength of the connection .

Claims (11)

1. An automatic line for manufacturing a mesh containing devices with longitudinal and transverse rods, a device for connecting longitudinal and transverse rods, made in the form of a device for producing a melt of thermoplastic material, a mold, a locking mechanism for a mold, a mesh moving mechanism and a receiving device, characterized the fact that it contains a forced cooling and / or heating system located in the area of the feed hopper for filling the material and in the area of the upper and lower half-molds, while The mesh performs reciprocating movements and runs continuously on cycles and periods and allows you to not stop the mesh during the closing of the half-molds, the device for producing the thermoplastic material melt is made in the form of a two-chamber injection unit with the feeding device of the molding material by means of a screw, and the receiving device is made in the form of a device packaging or winding mechanism in the form of a drum with a device cuts the mesh measured length. 2. The automatic line according to claim 1, characterized in that the devices with longitudinal and transverse rods are made in the form of drums with longitudinal rods and a feed mechanism for the transverse rods. 3. The automatic line according to claim 1, characterized in that the devices with longitudinal and transverse rods are made in the form of an intermediate drive into which longitudinal rods come from the line of their manufacture. 4. Automatic line according to claim 1, characterized in that devices with longitudinal and transverse rods are made in the form of guiding devices of longitudinal and transverse rods for large diameters of the rods. 5. The automatic line according to claim 1, characterized in that the device for producing a melt of thermoplastic material is made in the form of a metering cylinder. 6. Automatic line under item 1, characterized in that the longitudinal and transverse rods of a homogeneous material are used. 7. The automatic line according to claim 1, characterized in that longitudinal and transverse rods of different materials are used. 8. The automatic line according to claim 1, characterized in that longitudinal and transverse rods with a smooth surface are used. 9. The automatic line according to claim 1, characterized in that longitudinal and transverse rods with a rough, corrugated surface are used. 10. The automatic line according to claim 1, characterized in that it is configured to form intersections of longitudinal and transverse rods at different angles. 11. The automatic line according to claim 1, characterized in that the longitudinal and transverse rods may differ in size and cross-sectional shape of the rods.

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